<script>
    function myBrowser() {
      var userAgent = navigator.userAgent;
          var isOpera = userAgent.indexOf('Opera') > -1;
          if (userAgent.indexOf('compatible') > -1 && userAgent.indexOf('MSIE') > -1 && !isOpera) {
              alert('IE浏览器')
          }
          if (userAgent.indexOf('Firefox') > -1) {
              alert('Firefox浏览器')
          }
          if (userAgent.indexOf('Chrome') > -1) {
              alert('Chrome浏览器')
          }
          if ((navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i))) {
                  
                  alert("mobile")
              }
              else {
                
                  alert("pc")
              }
              if (userAgent.indexOf('micromessenger') > -1) {
              alert('微信浏览器')
          }else{alert('不是微信浏览器')}
  
              
      }
      myBrowser()
   
  </script>